Middlings-purifier



R; s. T. RUSSELL. Middlings Purifier.

No. 236,844. Patented Jan'. 18, 188i.

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UNITED STATES PATENT @FFICE.

ROMULUS S. T. RUSSELL, OF STANTON, DELAWARE.

MlDDLlNGS-PURIFIER.

SPECIFICATION forming part of Letters Patent No. 236,844, dated January 18, 1881.

Application filed February 19, 1880.

To all whom it may concern:

Be it known that I, EOMULUS S. T. RUS- sELL, of Stanton, in the county of New Castle and State of Delaware, have invented a new and valuable Improvement in Middlings-Purifiers; and I do hereby declare that the followin g is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawing, makin g a part of this specification, and to the letters and figures of reference marked thereon.

The drawing is a representation of a vertical central section of my improved middlingspurifier.

This invention has relation to middlings'purifiers in which a plane circular revolving cloth is used; and it consists in the construction and novel arrangement of parts, as hereinafter shown and described.

In the accompanying drawing, the letter A designates the general frame-work supporting the parts of this machine.

B indicates the case of the purifier, which is constructed with an upper portion, 0, of diameter sufficient to receive the frame of the boltin g-cloth, and a lower portion, D, of smaller diameter, but arranged in the same vertical axis. The wall a of this lower portion is therefore carried in well under the bolting-cloth, and is provided near its upper portion with a series of narrow vertical blast-slots, I), extending entirely around the case-wall. A horizontal annular ledge, E, connects the cylinderwalls a and a, and the wall a of the lower chamber, extending up on the inside above said ledge, forms the inner wall of the inner receiving-trough, F. This trough is annular in form, and is separated from the outer ledgetrough, G, by a circular partition, 0, which is located beneath the margin of the boltingcloth, so that what passes over will fall into the outer trough, while the middlings, passing through the outer portion of the cloth, willfall into the inner annular trough, F. From the arms H of the bolting-cloth 61 extend gathering strips or hangers 0 into these troughs, which serve to carry the middlings around to the discharging-spoutsK.

The bolting-cloth d is a plane circular disk stretched upon radial arms H, which extend from a central hub or hearing, L, on a vertical shaft, N. Below it are the braces P,which are connected with said arms H near their outer ends, and centrally to a hub or bearing, L. These bearings or collars areusually fixed on the shaft N, as is also the cloth -frame. Shaft N is tubular, and has extending up through it a shaft, N, resting at its lower end in a metallic step, 0, and having its bearing in a cross-bar of the mail frame A. Shaft N extends through the fan-case, and has the fan secured thereon. It is provided with a small pulley, f, having on its up side a clutch-face, g, that engages a clutch-face, g, upon the under side of a large pulley, J, secured to the shaft N aforesaid.

J ournaled in the side of the frame is a shaft, 0, rotated by suitable mechanisms, and having the large pulley q and the small pulley r on a leyel, respectively, with the small pulley f and the large pulley J. These pulleys are connected by the endless belt t t, and shaft 0 being rotated, the shaft N is driven faster than shaft N, with the effect of giving the shaft N, which is endwise movable in its bearings, a vertically-reciprocatiug motion, that rapidly jars the bolting-cloth, and thus prevents it from clogging.

It will be perceived that the entire mechanism of the purifier, including the stirrers, the bolting-cloths, and the fans, is driven by a very simple mechanism from a single short shaft, 0.

The operation of the machine is as follows: The middlings is fed to the center of the bolting-cloth 01 through a chute, d, or other means, and is driven outward therefrom by centrifugal motion over the surface of the cloth d. The best grade or portion of the middlings is discharged through cloth (1 Within the walls a of chamber D, on its floor g and is carried by the scrapers R to the spout K. The next best grade is carried by centrifugal force outward, and, falling through the bolting-cloth, is discharged into the annular trough F and delivcred through its appropriate spout K, and the refuse or tailings pass off of the bolting-cloth and fall into the outer annular trough, G, whence they are removed by the scrapers c and dropped through a spout. During the 2. The combinatimnwith the rotary endwisemovable tubular shaft N, the plane diskJike bolting-eloth d, and the large pulley J, having the elnteh-taee 9 upon its under side, of the shaft N, the small pulleyf, having the clutcht'ace g, and secured thereto, the driving-shaft: 0, having small pulley r and large pulley g, on a level, respectively, with the large pulley J and small pulleyfaforesaid, and the endless belts t t, substantially as specified.

In testimony that I claim the above I have passage of the middling's from the center to the perimeter of the bolting-cloth the lightest impurities are drawn up by the suction oi the fan and carried out of the machine. I

\Vhat- I claim as new, and desire to secure by Letters Patent, is-

1. The combination, with a casing: and an 1 axial endwise-movable tubular shat't, N, extending through the same,ot'a rotary shaft, N, extending through shat't X, the lmitil|; :'-(:l0th d, fixed to shat't X, the large pulley J, having clutch-face g on its under side, and also fixed hereunto subscribed my name in the presence to said shaft, the small pulleyf, havin; c1utch- F of two witnesses. face engaging clutch-face y and tixed to l shaft N, and the drive-shaft 0, its pulleys r q, ROMULUS RUSSELL on a level, respectively, with pulleys J {1, and l Witnesses:

G. N. CLARK,

EDWARD DAVIS.

connected therewith by endless belts, substani tially as specified. 

